diff --git a/reactos/include/xdk/fsrtlfuncs.h b/reactos/include/xdk/fsrtlfuncs.h
index dd8276747c2..9de4ed145e5 100644
--- a/reactos/include/xdk/fsrtlfuncs.h
+++ b/reactos/include/xdk/fsrtlfuncs.h
@@ -833,7 +833,7 @@ NTSTATUS
 NTAPI
 FsRtlRegisterUncProvider(
   _Out_ PHANDLE MupHandle,
-  _In_ PUNICODE_STRING RedirectorDeviceName,
+  _In_ PCUNICODE_STRING RedirectorDeviceName,
   _In_ BOOLEAN MailslotsSupported);
 
 _IRQL_requires_max_(PASSIVE_LEVEL)
diff --git a/reactos/ntoskrnl/fsrtl/unc.c b/reactos/ntoskrnl/fsrtl/unc.c
index 66fe76bc9e5..2f8a1afeb03 100644
--- a/reactos/ntoskrnl/fsrtl/unc.c
+++ b/reactos/ntoskrnl/fsrtl/unc.c
@@ -114,7 +114,7 @@ FsRtlpOpenDev(OUT PHANDLE DeviceHandle,
 }
 
 VOID
-FsRtlpSetSymbolicLink(IN PUNICODE_STRING DeviceName)
+FsRtlpSetSymbolicLink(IN PCUNICODE_STRING DeviceName)
 {
     NTSTATUS Status;
     UNICODE_STRING UncDevice;
@@ -126,14 +126,14 @@ FsRtlpSetSymbolicLink(IN PUNICODE_STRING DeviceName)
     IoDeleteSymbolicLink(&UncDevice);
     if (DeviceName != NULL)
     {
-        Status = IoCreateSymbolicLink(&UncDevice, DeviceName);
+        Status = IoCreateSymbolicLink(&UncDevice, (PUNICODE_STRING)DeviceName);
         ASSERT(NT_SUCCESS(Status));
     }
 }
 
 NTSTATUS
 FsRtlpRegisterProviderWithMUP(IN HANDLE MupHandle,
-                              IN PUNICODE_STRING RedirectorDeviceName,
+                              IN PCUNICODE_STRING RedirectorDeviceName,
                               IN BOOLEAN MailslotsSupported)
 {
     NTSTATUS Status;
@@ -278,7 +278,7 @@ FsRtlDeregisterUncProvider(IN HANDLE Handle)
 NTSTATUS
 NTAPI
 FsRtlRegisterUncProvider(OUT PHANDLE Handle,
-                         IN PUNICODE_STRING RedirectorDeviceName,
+                         IN PCUNICODE_STRING RedirectorDeviceName,
                          IN BOOLEAN MailslotsSupported)
 {
     NTSTATUS Status;